Melt 1/2lb butter and 4 squares of chocolate over medium heat.,Add 2C sugar and stir until dissolved.,One at a time, beat in 4 eggs.,Add 2tsp of vanilla and 1 1/2C flour.,Bake in 13x19" pan (greased) at 325*F for 25-30min. Cool.,Frosting:,Mix to a spreadable consistency: 4C confectioner's sugar, 1C butter (1/2lb), 2tsp vanilla extract and about 2tbsp of milk. Add food coloring if desired.,Top layer:,Melt 4 squares chocolate, 4tbsp butter (1/2 stick), 4tbsp sugar together. Pour over brownies.,Refrigerate to harden chocolate.,______